Using your Sea to Summit Frontier Collapsible Bowl is easy. First, just open up the bowl from its collapsed state. It's ready to use for your meals or drinks right away. When you're done eating, simply clean it with mild soap and water. You can collapse it flat when not in use to save space in your backpack. Make sure to dry it thoroughly before storing to prevent any mold or mildew. Don't use abrasive cleaners or sharp objects on the bowl as they could damage the glass - reinforced nylon or silicone rubber. And remember, this bowl comes with a lifetime guarantee, so you can enjoy worry - free adventures with it.